wrench

Abstract

Wrench that includes: a main body (10) having a handle (11), wherein the two ends and the top and bottom of the handle (11) form four first surfaces (111), wherein the four first surfaces (111) are planar surfaces, wherein two first surfaces (111) coincide on the same side, wherein the two first surfaces (111) on the top and bottom are parallel, wherein the top and bottom of the handle (11) are provided with four first recesses (112), wherein the first recesses (112) are formed in the area of ​​the first surfaces (111), wherein the first recesses (112) have the form of a depression, wherein a first connecting section (1121) is provided between one end of the first recess (112) and the first surface (111), wherein the first connecting section (1121) smoothly connects the first recess (112) and the first surface (111); wherein the handle (11) is provided with four projections (113) in the middle of the upper and lower surfaces, each of the projections (113) being elongated, wherein four first surfaces (111) and four first recesses (112) are symmetrical to the four projections (113), i.e. the four projections (113) are located between the four first surfaces (111) and the four first recesses (112), each of the projections (113) being provided with a second surface (114), the second surfaces projecting from the upper and lower surfaces of the first surfaces (111), a second connecting section (1141) being provided between the second surface (114) and the first surface (111), the second connecting section (1141) smoothly connecting the second surface (114) and the first surface (111), wherein the handle (11) is provided with two recesses (115) in the middle of the upper and lower surfaces, i.e. a second recess (115) is provided between two second projections (113), wherein the two projections (113) are symmetrical to the second recess (115), wherein a third connecting section (1151) is provided between the second recess (115) and the first recess (112), wherein the third connecting section (1151) slidably connects the second recess (115) and the first recess (112), wherein the second connecting section (1151) is located between two second connecting sections (1141), wherein the two second connecting sections (1141) are symmetrical to the third connecting section (1151); wherein the handle (11) is provided with eight ribs (116), wherein the eight ribs (116) are symmetrical to the four projections (113), wherein two ribs (116) are arranged on both sides of the first recess (112), wherein the two ribs (116) are symmetrical to the first recess (112), wherein one end of the rib (116) is connected to the first surface (111), wherein the rib (116) and the first surface (111) coincide, and wherein the other end of the rib (116) is connected to the second connecting section (1141); wherein two first side surfaces (117) are formed on the left and right sides of the first surface (11), wherein two second side surfaces (118) are formed on the two sides of the projection (113), wherein the two second side surfaces (118) project from the two first side surfaces (117), wherein first guide corners (119) are provided between the first side surfaces (117) and the second side surfaces (118); the handle (11) has a first length (31), wherein the sum of the length of the projection (113) and the second connecting section (151) defines a second length (32), wherein the first length (31) is greater than the second length (32); wherein the maximum width between the two projections (113) defines a first width (33), i.e. there is a first width (33) between the two second side faces (118), wherein the second face (114) has a second width (34), wherein the second recess (115) has a third width (35), wherein there is a fourth width (36) at the junction between the first turned part (12) and the handle (11), wherein there is a fifth width (37) at the narrowest point of the first recess (112), wherein the rib (16) has a sixth width (38), wherein there is a seventh width (39) at the junction between the second turned part (13) and the handle (11), wherein the seventh width (39) is close to or equal to the fourth width (36); wherein the first width (33) has the largest value, wherein the first width (33) is greater than the fourth width (36), wherein the fourth width (36) is greater than the fifth width (37), wherein the fifth width (37) is greater than the third width (35), wherein the third width (35) is greater than the second width (34), wherein the second width (34) is greater than the sixth width (38); and wherein there is a first thickness (41) between the two second surfaces (114), wherein there is a second thickness (42) between the two second recesses (115), wherein there is a third thickness (43) between the two first surfaces (111), wherein the third thickness (43) is located near the first turned part (12) or the second turned part (13), wherein there is a fourth thickness (44) between the two first recesses (112), wherein the first thickness (41) has the largest value, wherein the first thickness (41) is greater than the second thickness (42), wherein the second thickness (42) is greater than the third thickness (43), wherein the third thickness (43) is greater than the fourth thickness (44).

Description

TECHNICAL FIELD

[0001] The invention relates to a wrench, wherein the top and bottom surfaces of the handle are provided with first recesses. The handle is provided with projections. Second recesses are provided at the locations of the projections. The first recesses can reduce the weight of the handle. The second recesses can also reduce the weight of the handle. The projections can increase the torque during rotation. The handle can structurally balance the weight and torque. Therefore, holding and rotating the main body is more comfortable. STATE OF THE ART

[0002] The previous patent application, with US patent application number 15 / 208625, Taiwanese patent application number 105115249, certificate number I579114, titled Wrench as in Fig. 1, Fig. 2 and Fig. 3 of the publication, is provided on the handle 11 with a first projection 113, wherein the first projection 113 projects from the top and bottom of the first surface 111. The handle has a first length 31, and the maximum length of the first projection 113 is defined as the second length 32. The ratio of the first length 31 to the second length 32 is 4:1 to 2:1. The thickness of the handle 11 is defined as the first thickness 33, the minimum thickness of the first recess 112 is defined as the second thickness 34, and the thickness of the first projection 113 is defined as the third thickness 35.

[0003] The disadvantages of this wrench are as follows: The first protrusion 113 has a second length of 32 and a third thickness of 35. The first protrusion 113 allows for greater torque and has structural advantages, but the handle 11 has no space for the hand to support it. When the hand holds the handle 13, the hand tends to naturally slide along the handle 11. OBJECT OF THE INVENTION

[0004] Problems in the prior art: In the prior art, the first protrusion has the second length and the third thickness. The first protrusion allows for greater torque and has structural advantages, but the handle has no space for hand support. In the invention, the top and bottom of the handle are provided with the first recesses. The handle is provided with the protrusions. Second recesses are provided at the locations of the protrusions. The first recesses can reduce the weight of the handle. The second recesses can also reduce the weight of the handle. The protrusions can increase the torque during rotation. The handle can structurally balance the weight and torque. Therefore, holding and rotating the main body is more comfortable.

[0005] The technical solution to the problems in the prior art: a wrench comprising a main body having a handle, four first surfaces, four first recesses, four projections, one second surface, two second recesses, eight ribs, two first side surfaces, two second side surfaces, and a first guide corner. The handle has a first width, a second width, a third width, a fourth width, a fifth width, and a sixth width, the first width being greater than the fourth width, the fourth width being greater than the fifth width, the fifth width being greater than the third width, the third width being greater than the second width, the second width being greater than the sixth width. The handle has a first thickness, a second thickness, a third thickness, and a fourth thickness.

[0006] Compared with the prior art, the advantages are as follows: The top and bottom surfaces of the handle are provided with first recesses. The handle is provided with protrusions. Second recesses are provided at the locations of the protrusions. The first recesses can reduce the weight of the handle. The second recesses can also reduce the weight of the handle. The protrusions can increase the torque during rotation. The handle can structurally balance the weight and torque. The handle has eight ribs and thus has torsional toughness. The first recesses, the protrusions, the second recesses, and the ribs can reduce the weight of the handle and increase the torque and strength. Therefore, holding and rotating the main body is more comfortable, and the invention thus has multiple advantages. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of the wrench of the invention, Fig. 2 a plan view of the wrench of the invention, Fig. 3 a sectional view along the line AA in Fig. 2, Fig. 4 is a perspective view of the second embodiment of the invention of the wrench of the invention, Fig. 5 is a perspective view of the third embodiment of the invention of the wrench of the invention, Fig. 6 is a perspective view of the fourth embodiment of the invention of the wrench of the invention, Fig. 7 is a perspective view of the fifth embodiment of the invention of the wrench of the invention, Fig. 8 is a perspective view of the sixth embodiment of the invention of the wrench of the invention, Fig. 9 is a perspective view of the seventh embodiment of the invention of the wrench of the invention, Fig. 10 is a perspective view of the eighth embodiment of the invention of the wrench of the invention, Fig. 11 is a perspective view of the ninth embodiment of the invention of the wrench of the invention, Fig. 12 is a perspective view of the tenth embodiment of the invention of the wrench of the invention. Implementation of the invention

[0007] Fig. 1 shows a perspective view of the wrench of the invention, Fig. Figure 2 shows a plan view of the wrench of the invention, and Fig. 3 shows a sectional view along the line AA in Fig. 2. The invention relates to a screw wrench comprising: a main body 10 having a handle 11, wherein the two ends and the top and bottom of the handle 11 form four first surfaces 111, wherein the four first surfaces 111 are flat surfaces, wherein two first surfaces 111 coincide on the same side, wherein the two first surfaces 111 are parallel on the top and bottom, wherein the top and bottom of the handle 11 are provided with four first recesses 112, wherein the first recesses 112 are formed in the region of the first surfaces 111, wherein the first recesses 111 have the shape of a depression, wherein a first connecting portion 1121 is provided between one end of the first recess 112 and the first surface 111, wherein the first connecting portion 1121 smoothly connects the first recess 112 and the first surface 111, wherein the first connecting portion 1121 is oblique or the first connecting portion 1121 is arcuate; wherein the handle 11 is provided in the middle of the top and bottom with four projections 113, each of the projections 113 being elongated, wherein four first surfaces 111 and four first recesses 112 are symmetrical to the four projections 113, iebetween the four first surfaces 111 and the four first recesses 112 there are four projections 113, each of the projections 113 being provided with a second surface 114, the second surfaces 114 being flat surfaces, the second surfaces 114 projecting from the top and bottom of the first surfaces 111, a second connecting section 1141 being provided between the second surface 114 and the first surface 111, the second connecting section 1141 smoothly connecting the second surface 114 and the first surface 111, the second connecting section 1141 being oblique or arcuate, a groove 1142 being provided in the region of the second surface 114, various color materials being able to be filled into the groove 1142;. wherein the handle 11 is provided with two recesses 115 in the middle of the top and bottom, i.e. a second recess 115 is provided between two second projections 113, the two projections 113 being symmetrical to the second recess 115, the second recesses 115 being planar, a third connecting portion 1151 being provided between the second recess 115 and the first recess 112, the third connecting portion 1151 slidingly connecting the second recess 115 and the first recess 112, the second connecting portion 1151 being located between two second connecting portions 1141, the two second connecting portions 1141 being symmetrical to the third connecting portion 1151, the third connecting portion 1151 being oblique or the third connecting portion 1151 being arcuate; wherein the handle 11 is provided with eight ribs 116, wherein the eight ribs 116 are symmetrical to the four projections 113, wherein two ribs 116 are arranged on both sides of the first recess 112, wherein the two ribs 116 are symmetrical to the first recess 112, wherein one end of the rib 116 is connected to the first surface 111, wherein the rib 116 and the first surface 111 coincide, wherein the other end of the rib 116 is connected to the second connecting portion 1141; wherein two first side surfaces 117 are formed on the left and right sides of the first surface 111, wherein the first side surfaces 117 run vertically to the first surface 111, wherein two second side surfaces 118 are formed on the two sides of the projection 113, wherein the two second side surfaces 118 protrude from the two first side surfaces 117, wherein the second side surfaces 118 run vertically to the second surfaces 114, wherein first guide corners 119 are provided between the first side surfaces 117 and the second side surfaces 118, wherein the first guide corners 119 are concavely arcuate or the first guide corners 119 are oblique;wherein one end of the handle 11 is provided with a first rotary part 12, wherein the first rotary part 12 is fork-shaped, wherein the first rotary part 12 forms two third surfaces 121, wherein the third surfaces 121 protrude from the first surfaces 111, wherein the third surfaces 121 are connected to the first surfaces 111, wherein a specification mark is provided on the third surface 121; wherein the other end of the handle 11 is provided with a second rotating part 13, wherein the second rotating part 13 is annular, wherein the second rotating part 13 forms two fourth surfaces 131, wherein the fourth surfaces 131 protrude from the first surfaces 111, wherein the fourth surfaces 131 are connected to the first surfaces 111, wherein a specification mark is provided on the fourth surface 131; the handle 11, as in Fig. 2, has a first length 31, ie there is a first length 31 between the third surfaces 121 and the fourth surfaces 131, the sum of the length of the projection 113 and the second connecting portion 151 defining a second length 32, the first length 31 being greater than the second length 32, the first length 31 being between 1.5 times and 2 times the second length 32, or the first length 31 being between 1.6 times and 1.9 times the second length 32, or the first length 31 being almost 1.75 times the second length 32; wherein the maximum width between the two projections 113 defines a first width 33, i.e. there is a first width 33 between the two second side surfaces 118, wherein the second surface 114 has a second width 34, wherein the second recess 115 has a third width 35, wherein there is a fourth width 36 at the connection point between the first rotary part 12 and the handle 11, wherein there is a fifth width 37 at the narrowest point of the first recess 112, wherein the rib 16 has a sixth width 38, wherein there is a seventh width 39 at the connection point between the second rotary part 13 and the handle 11, wherein the seventh width 39 is close to or equal to the fourth width 36; wherein the first width 33 has the largest value, wherein the first width 33 is greater than the fourth width 36, wherein the fourth width 36 is greater than the fifth width 37, wherein the fifth width 37 is greater than the third width 35, wherein the third width 35 is greater than the second width 34, wherein the second width 34 is greater than the sixth width 38; where, as in Fig. 3, there is a first thickness 41 between the two second surfaces 114, there is a second thickness 42 between the two second recesses 115, there is a third thickness 43 between the two first surfaces 111, the third thickness 43 being located near the first rotary part 12 or the second rotary part 13, there is a fourth thickness 44 between the two first recesses 112, the first thickness 41 having the greatest value, the first thickness 41 being greater than the second thickness 42, the second thickness 42 being greater than the third thickness 43, the third thickness 43 being greater than the fourth thickness 44; and wherein the first thickness 41 is between 1.2 times and 1.3 times the second thickness 42, wherein the first thickness 41 is between 1.4 times and 1.7 times or 1.5 times and 1.6 times the third thickness 43, wherein the third thickness 43 is between 1.7 times and 2 times the fourth thickness 44.

[0008] Fig. Figure 4 shows a perspective view of the second embodiment of the wrench of the invention. In this embodiment, the second surface 114 is not provided with the groove 1142.

[0009] Fig. Figure 5 shows a perspective view of the third embodiment of the wrench of the invention. In this embodiment, the third surface 121 is not provided with the specification marking.

[0010] Fig. Figure 6 shows a perspective view of the fourth embodiment of the wrench of the invention. In this embodiment, the fourth surface 131 is not provided with the specification marking.

[0011] Fig. Figure 7 shows a perspective view of the fifth embodiment of the wrench of the invention. In this embodiment, the first recess 112 and the second recess 115 are provided with a plurality of holes 1191 that may have a circular shape, a long circular shape, or other shapes. The holes 1191 may all be through-holes, all be non-through-holes, or partially through-holes.

[0012] Fig. Figure 8 shows a perspective view of the sixth embodiment of the wrench of the invention. In this embodiment, the first recess 112 and the second recess 115 are provided with holes 1191, wherein the holes 1191 are through holes.

[0013] Fig. Figure 9 shows a perspective view of the seventh embodiment of the wrench of the invention. The second surface 114 is not provided with the groove 1142. The first recess 112 is arcuate at the end facing away from the projection 13, ie, it is arcuate near the first rotating part 12 or the second rotating part 13.

[0014] Fig. Figure 10 shows a perspective view of the eighth embodiment of the wrench of the invention. In this embodiment, the second surface 114 is not provided with the groove 1142. No third connecting portion 1151 is provided between the second recess 115 and the first recess 112. The first recess 112 is a separate recess.

[0015] Fig. Figure 11 shows a perspective view of the ninth embodiment of the wrench of the invention. In this embodiment, the second surface 114 is not provided with the groove 1142. The second side surface 118 is a convex surface. The rib 116 has a slanted surface and connects the projection 113 and the first surface 111.

[0016] Fig. Figure 12 shows a perspective view of the tenth embodiment of the wrench of the invention. In this embodiment, the second surface 114 is not provided with the groove 1142. The rib 116 protrudes from the first surface 111, meaning that the rib 116 and the first surface 111 lie on different planes. The rib 116 and the first surface 111 are connected by an arcuate or oblique guide corner. The second side surface 118 is a convex surface.

[0017] In a further embodiment, as in Fig. 5 and Fig.6, the third surface 121 is not provided with the specification marking, and the fourth side 131 is not provided with the specification marking. The second recess 115 can be provided with a plurality of marks or a plurality of patterns. The plurality of marks or the plurality of patterns can be depressed or raised, or formed flat by printing technology.

[0018] The advantages of the invention are as follows: 1. The top and bottom surfaces of the handle 11 are provided with first recesses 112. The handle 11 is provided with projections 113. Second recesses 115 are provided at the locations of the projections. The first recesses 112 can reduce the weight of the handle. The second recesses 115 can also reduce the weight of the handle 11. The projections 113 can increase the torque during rotation. The handle 11 can structurally balance the weight and torque. 2. The handle 11 has eight ribs 116. Two ribs 116 are provided on each side of the first recess 112. The eight ribs 116 can generate torque. The first recesses 112 and the eight ribs 116 can ensure that the handle 11 has torsional toughness. The handle 11 is less likely to break during rotation. 3. The handle 11 has a first thickness of 41, a second thickness of 42, a third thickness of 43, and a fourth thickness of 44. The handle 11 has different thicknesses at different positions. The structural design of different thicknesses allows the handle 11 to reduce weight and increase torque and torsional toughness. 4. By combining points 1 to 3, the first recesses 112, the projections 113, the second recesses 115, and the rib 116 can reduce the weight of the handle 11 and increase the torque and strength. Therefore, the wrench has three structural advantages. 5. When the operator holds and turns the wrench, the thumb of the operator's hand can reliably rest against the first guide corner 119. The first guide corner 119 can support the thumb during turning, thus facilitating turning. 6. When the operator holds and rotates the wrench, the protrusion 113 has the first thickness 41, the first thickness 41 being greater than the third thickness 43. The thumb of the hand can reliably abut the second connecting portion 1141 and the third connecting portion 1151. The thumb of the hand can more easily abut the two ends of the protrusion 113 when rotating. 7. When the hand holds and rotates the wrench, the thumb of the hand can reliably abut against the second connecting portion 1141 and the third connecting portion 1151 or the first guide corner 119. 8. In addition to items 5 to 7, when holding the main body 10, the operator can place his or her thumb on the protrusion 113, or on the second connecting portion 1141 and the third connecting portion 1151, or on the guide corner 119, depending on his or her personal operating habits. The main body 10 provides several locations where the thumb of the hand can rest. 9. The handle 11 has the first thickness 41, the second thickness 42, the third thickness 43, the fourth thickness 44, the first width 33, the second width 34, the third width 35, the fourth width 36, the fifth width 37, the sixth width 38 and the seventh width 39, whereby the handle 11 can reduce the weight, increase the torque and rotational toughness and make it easier to hold the main body, so that the wrench has multiple advantages. 10. The handle 11 has the first surfaces 111, the first recesses 112, the projections 113, the second surfaces 114, the second recesses 115, the ribs 116, the first side surfaces 117 and the second side surfaces, whereby the handle 11 has a variety of different structural designs, so that the appearance of the handle 11 becomes more three-dimensional. List of reference symbols 10 main bodies 11 Handle 111 first area 112 first recess 1121 first connecting section 113 lead 114 second area 1141 second connecting section 1142 groove 115 second recess 1151 third connecting section 116 Rib 117 first side surface 118 second side surface 119 first leading corner 1191 hole 12 first turning part 121 third area 13 second rotating part 131 fourth area 31 first length 32 second length 33 first width 34 second width 35 third width 36 fourth width 37 fifth width 38 sixth width 39 seventh width 41 first thickness 42 second thickness 43 third thickness 44 fourth thickness QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] US 15 / 208625

[0002]

Claims

[1] Wrench that includes: a main body (10) having a handle (11), wherein the two ends and the top and bottom of the handle (11) form four first surfaces (111), the four first surfaces (111) being flat surfaces, two first surfaces (111) coinciding on the same side, the two first surfaces (111) being parallel on the top and bottom, the top and bottom of the handle (11) being provided with four first recesses (112), the first recesses (112) being formed in the region of the first surfaces (111), the first recesses (112) having the shape of a depression, a first connecting section (1121) being provided between one end of the first recess (112) and the first surface (111), the first connecting section (1121) smoothly connecting the first recess (112) and the first surface (111); wherein the handle (11) is provided with four projections (113) in the middle of the top and bottom, each of the projections (113) being elongated, four first surfaces (111) and four first recesses (112) being symmetrical to the four projections (113), i.e., the four projections (113) are located between the four first surfaces (111) and the four first recesses (112), each of the projections (113) being provided with a second surface (114), the second surfaces of the top and bottom of the first surfaces (111) projecting, a second connecting portion (1141) being provided between the second surface (114) and the first surface (111), the second connecting portion (1141) smoothly connecting the second surface (114) and the first surface (111), wherein the handle (11) is provided with two recesses (115) in the middle of the top and bottom, i.e. a second recess (115) is provided between two second projections (113), the two projections (113) being symmetrical to the second recess (115), a third connecting section (1151) being provided between the second recess (115) and the first recess (112), the third connecting section (1151) slidingly connecting the second recess (115) and the first recess (112), the second connecting section (1151) being located between two second connecting sections (1141), the two second connecting sections (1141) being symmetrical to the third connecting section (1151); wherein the handle (11) is provided with eight ribs (116), wherein the eight ribs (116) are symmetrical to the four projections (113), wherein two ribs (116) are arranged on both sides of the first recess (112), wherein the two ribs (116) are symmetrical to the first recess (112), wherein one end of the rib (116) is connected to the first surface (111), wherein the rib (116) and the first surface (111) coincide, wherein the other end of the rib (116) is connected to the second connecting portion (1141); wherein two first side surfaces (117) are formed on the left and right sides of the first surface (11), wherein two second side surfaces (118) are formed on the two sides of the projection (113), wherein the two second side surfaces (118) protrude from the two first side surfaces (117), wherein first guide corners (119) are provided between the first side surfaces (117) and the second side surfaces (118); the handle (11) has a first length (31), wherein the sum of the length of the projection (113) and the second connecting portion (151) defines a second length (32), wherein the first length (31) is greater than the second length (32); wherein the maximum width between the two projections (113) defines a first width (33), i.e. there is a first width (33) between the two second side surfaces (118), wherein the second surface (114) has a second width (34), wherein the second recess (115) has a third width (35), wherein there is a fourth width (36) at the connection point between the first rotary part (12) and the handle (11), wherein there is a fifth width (37) at the narrowest point of the first recess (112), wherein the rib (16) has a sixth width (38), wherein there is a seventh width (39) at the connection point between the second rotary part (13) and the handle (11), wherein the seventh width (39) is close to or equal to the fourth width (36); wherein the first width (33) has the largest value, wherein the first width (33) is greater than the fourth width (36), wherein the fourth width (36) is greater than the fifth width (37), wherein the fifth width (37) is greater than the third width (35), wherein the third width (35) is greater than the second width (34), wherein the second width (34) is greater than the sixth width (38); and wherein there is a first thickness (41) between the two second surfaces (114), wherein there is a second thickness (42) between the two second recesses (115), wherein there is a third thickness (43) between the two first surfaces (111), wherein the third thickness (43) is located near the first rotating part (12) or the second rotating part (13), wherein there is a fourth thickness (44) between the two first recesses (112), wherein the first thickness (41) has the greatest value, wherein the first thickness (41) is greater than the second thickness (42), wherein the second thickness (42) is greater than the third thickness (43), wherein the third thickness (43) is greater than the fourth thickness (44). [2] Wrench according to claim 1, characterized byin that the first connecting section (1121) is oblique or the first connecting section (1121) is arcuate, wherein the second recesses (115) are planar, wherein the second connecting section (1141) is oblique or arcuate, wherein a groove (1142) is provided in the region of the second surface (114), wherein various color materials can be filled into the groove (1142), wherein the second recesses (115) are planar, wherein the third connecting section (1151) is oblique or the third connecting section (1151) is arcuate, wherein the first side surfaces (117) run vertically to the first surface (111), wherein the second side surfaces (118) run vertically to the second surfaces (114), and wherein the first guide corners (119) are concavely arcuate or the first guide corners (119) are oblique. [3] Wrench according to claim 1, characterized byin that one end of the handle (11) is provided with a first rotary part (12), the first rotary part (12) being fork-shaped, the first rotary part (12) forming two third surfaces (121), the third surfaces (121) projecting from the first surfaces (111), the third surfaces (121) being connected to the first surfaces (111), a specification marking being provided on the third surface (121), and in that the other end of the handle (11) is provided with a second rotary part (13), the second rotary part (13) being annular, the second rotary part (13) forming two fourth surfaces (131), the fourth surfaces (131) projecting from the first surfaces (111), the fourth surfaces (131) being connected to the first surfaces (111), a specification marking being provided on the fourth surface (131). [4] Wrench according to claim 1, characterized bythat the first length (31) is between 1.5 times and 2 times the second length (32), or the first length (31) is between 1.6 times and 1.9 times the second length (32), or the first length (31) is almost 1.75 times the second length (32); and that the first thickness (41) is between 1.2 times and 1.3 times the second thickness (42), wherein the first thickness (41) is between 1.4 times and 1.7 times or 1.5 times and 1.6 times the third thickness (43), wherein the third thickness (43) is between 1.7 times and 2 times the fourth thickness (44). [5] Wrench according to claim 1, characterized by that the first recess (112) or the second recess (115) can be provided with a plurality of holes (1191) which have a circular shape or a long circular shape, wherein the holes (1191) can all be continuous or all not continuous or partially continuous. [6] Wrench according to claim 1, characterized bythat the first recess (112) is arcuate at the end facing away from the projection (13), ie it is arcuate in the vicinity of the first rotary part (12) or the second rotary part (13). [7] Wrench according to claim 1, characterized by that no third connecting section (1151) is provided between the second recess (115) and the first recess (112), wherein the first recess (112) is a separate recess. [8] Wrench according to claim 1, characterized by that the second side surface (118) is a convex surface and the rib (116) has an inclined surface and connects the projection (113) and the first surface (111). [9] Wrench according to claim 1, characterized bythat the rib (116) of the first surface (111) protrudes, ie the rib (116) and the first surface (111) lie on different planes, wherein the rib (116) and the first surface (111) are connected by an arcuate or oblique guide corner, and wherein the second side surface (118) is a convex surface.

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